Mechanics

READING CODES 2195 AND 2197 WHICH ARE O-2 SENSOR CODES

2004 Ford F-150 • 178,000 miles

I have a 2004 Ford F-150, 4.6. It’s reading codes 2195 and 2197 which are O-2 sensor codes. I’ve replaced both #1 O-2 sensors, the MAF sensor, the fuel filter and all suspect Vacuum hoses. I’ve also checked for Vacuum leaks, cleaned the ICV and EGR valve. The fuel pressure is 38 (should be between 30 and 40). Checked the temp. In front of and behind the Catalytic Converter ( under 100 degrees difference). I’ve invested a lot of money in parts that have not resolved the problem. Can I check the ICV by connecting it to a battery and see if *** is fully opening? I’ve checked the ohms (reading 10.1 – 2prong). I could sure use some help ! Thanks
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Tom hay 58
December 19, 2011.




So there's no performance problem only the codes wont go away? You did erase them after parts change?

Tiny
Fixitmr
Dec 19, 2011.
I'm sorry I should have said The truck is ideling worse then before. When it's first started it will idel fast then very rough at around 1000 rpms then die.

Tiny
Tom hay 58
Dec 19, 2011.
Could be vacuum leak check All the hoses, check for cracks in the intake manifold, bolts loose, gasket sucked in, air entering the exhaust ahead of the OX sensors is all detected by the OX sensors and try to richen up fuel injected but can only go so far in corrections.
This goes to the point the motor runs rough from leaness in and not enough fuel to counter the leaness.
There are different procedures to use for leak detection. Some use propane, some use smoke, some use a scanner to watch certain sensor reactions to forced test procedures.
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Tiny
Fixitmr
Dec 19, 2011.
I've sprayed carb cleaner all around the intake and presure checked the elbow at the PCV. I've ordered a new PCV and will try that tonight. (Nobody had on in stock). I think I, ve done a good job of checking for a vacuum leak but I'll try again.

Any other ideas?

Thanks.

Tiny
Tom hay 58
Dec 19, 2011.

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